Combined kiln and drying-oven.



No. 672,302. Patented Apr. l6, l90l. H. F. J. WEIJEBS.

COMBINED KILN AND DRYING OVEN.

(Application filed July 12, 1899.)

(No Model.)

V Q m Q Fig. 1.

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HENRI FRANS JOSEPH VVEIJERS, OF UDENHAUT, NETHERLANDS.

CDBINED KILN AND DRYING -OVEN.

SPECIFICATION forming part of Letters Patent No. 672,302, dated April16, 1901.

Application filed July 12, 1899- Serial No. 723,553. (No model.)

To all whom it may concern:

Be it known that I, HENRI Farms JOSEPH WEIJERS, a subject of the Queenof the Netherlands, residing at Udenhaut, Netherlands, have inventedcertain new and useful Improvements in a Combined Kiln and Drying- Oven,(for which I have applied for patents in England, No. 4,831, dated Marchat, 1899; in Austria, dated March 13, 1899; in France, No. 272,840,dated January 14, 1899; in Be1- gium, No. 109,909, dated January 16,1899; in Spain, dated January 18, 1899; in Italy, dated January 23,1899; in Russia, dated March 13, 1899, and in Hungary dated March 25,1899,) of which the following is a specification.

This invention relates to a combined kiln and drying-oven in which thedrying-chamber is formed as a channel over the smokeflue between therows of chambers of the oven, so that the longitudinal sides and thebottom of the drying-chamber are inclosed by chambers containing hot airor other gases, and the drying-chamber is thus heated only by radiationfrom the neighboring parts without separate fire, and that air can bedrawn in and introduced to the drying-chamber through the chamberstemporarily undergoing cooling.

In order that this invention may be the better understood, I now proceedto describe the same, reference being had to the accompanying drawingsand to the letters marked thereon.

Figure 1 shows a longitudinal section. Fig. 2 shows a horizontal sectionon the line A A, Fig. 3 shows a transverse section on the line B B, Fig.2.

In similar ovens as constructed at present a great amount of heat isaccumulated in the interior, the great part of which heat escapesultimately to the outer atmosphere without.

having been utilized, While the drying apparatus-say in a brickworksisheated separately. In consequence the cost of the plant In this mannercirculation is produced in the apparatus and the burned material isquickly cooled.

The oven formed by the wall 0 is constructed so that the kiln-chambers Bare arranged at the sides of and at the same level as the drying chamberor channel K, which is situated in the middle of the oven. Thesechambers B are heated in the usual manner, and the flames may be ledfrom one chamber to the other through apertures, such as indicated indotted lines in Fig. 3. To carry the flames or fire from onecorner-chamber to the corner-chamber of the opposite row of chambers,channels L are provided beneath the drying-chamber K. The chambers Bareall. accessible from the outside by orifices O in the walls 0, andeXit-flues E are arranged in the crowns of the chamber B. The dryingchamber or channel K, arranged between the rows of chambers B, has alsoorifices I in its crown, which communicate through the tube R with theorifices E of those kiln-chambers B which have been in operation andwhich are to be cooled. The drying chamber or channel K runs through thewhole length of oven and is closed at each end by adoor. It has railsalong its floor, on which run the trucks carrying the materials to bedried. Below the drying chamber or channel K is situated the smokechannel or flue S, through which the gases pass from the chambers to theuptake. These gases enter the flue S through channels 5, provided withsuitable valves 5. Thus the drying-chamber is situated between the tworows of kiln or fire chambers and above the smoke-escape flue. Inconsequence three of its sides are heated along its whole length by heatradiating from parts containing hot gases. In order to make theconditions for radiation as favorable as possible, the bottom ofthedrying-chamber K, which forms also the top of the smoke-flue S, isformed of corrugated sheet-metal iron plates and partially arched.Exhaust-steam may be used to advantage in the customary manner in theflue S as a source of heat and draft. The draft for the air and thecarrying off of the water-vapor is produced by a chimney F or aventilator. This produces a strong current of air through the wholelength of the drying-channel. The ceiling 7c,of corrugated sheet metal,which is interposed between the channel K and its arched crown ofmasonry, provides a longitudinal channel K above said metal ceiling isand communicating with the channel K at the end remote from thedraft-chimney F, as shown in Fig. 1. Into this channel K the gases aredelivered through the apertures I from such of the kiln-chambers B asare being cooled, these gases being thus compelled to pass through theextreme length of the drying-channel K and back again to thedraft-chimney F, and by this means their waste heat is more fullyutilized.

As shown in Fig. 3 and in dotted lines in Fig. 2, the smoke-flue S,beneath the dryingchannel K, is divided longitudinally by a partitionS,extending nearly from end to end, as shown in Fig. 2, a communicationbeing left, as shown at the right-hand end of Fig.

v 2, around the partition, while at the left-hand end the dividedsmoke-flueis shown commucating with a smoke-flue T, leading to the stackU. (Shown in Fig. 3.) At the lefthand end of the partition S there isalso indicated in dotted lines, in slightly oblique position, a damper Swhich, as there shown, shuts off communication from the farther side ormember of the smoke-flue to the chimney-flue T. In this position it willbe apparent that the gases entering the smoke-flue S from the range ofchambers B on the farther side of the structure will be conducted in acircuitous path around the partition S, so as to traverse the length ofthe structure from end to end and back again before escaping to thesmoke-flue T. If, however, the above deflecting-plate (the damper S beturned to the other position, so as to cut off the lower section of theflue S, it will be apparent that the gases from the chambers B on thenear side of the structure will in like manner be carried from one endto the other of the smoke-flue and back again in a circuitous pathbefore reaching the discharge-flue T. I am thus enabled to carry the hotgases in a circuitous path from end to end of the oven whichever rangeof chambers may be for the time in use or giving off the hottest gasesor the largest amount of gases of combustion and am enabled to compelthe gases of combustion which issue from the combustionchambers in thevicinity of the dischargeflue to take a course twice the length of the'oven, or nearly so, so as to utilize the hot gases to the greatestpossible extent. A further important practical advantage of thisprovision is that I am enabled to cause the flow of the hottest gases ofcombustionin a direction opposite to the movement of the goods ormaterials which are being dried.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

1. The combination of the drying-channel K, the kiln-chambers B, B, oneach side of said drying-channel and the smoke-flue S beneath saiddrying-channel to heat the same, divided longitudinally by a partitionS, and plate S extending to a wall of the smoke-flue, as and for thepurposes shown and described.

2. The combination of the two rows of kilnchambers B, B, the tunnelforming a dryingchannel K between said rows of kiln-chambers, and thesmoke-flue S beneath said drying-channel, separated therefrom by a roofpermitting passage of heat and having a longitudinal vertical partitionS, and plate S forming a continuation of said partition at one end andextending to a wall of the smokeflue, compelling the hot gases to flowin a circuitous course beneath the floor of the dryingchannel, asexplained.

3. The combination of kiln-chambers B, B, in parallel rows, thetunnel-formed dryingchannel K located between the rows of kilnchambers,smoke-flue S beneath the dryingchannel, longitudinal partition Stherein, plate S forming a continuation of the partition S, andextending to a wall of the smokeflue, tubes R connecting thekiln-chambers B and drying-chain bers and apertures U admitting air tothe respective kiln-chambers and permitting the passage of airtherethrough to the drying-chamber K, as explained.

4. The combination of the rows of kilnchambers B, B, the centraltunnel-formed drying-chan nel K, the smoke-flue S beneath thedrying-chamber, vertical partition S dividing the smoke-flue into twolongitudinal sections and passages 49 conducting gases from thekilnchambers B, B, to the smoke-flue S, dischargeflue T anddeflecting-plate S placing either section of the flue S in communicationwith the flue T, as explained.

5. The combination of two rows of kilnchambers B, B, tunnel-formeddrying-channel K between said rows of kiln-chambers, the smoke-flue Sbeneath the drying-channel and connections L between the kiln -chamberspassing beneath the tunnel-formed dryingchannel, substantially as shownand described.

6. The combination of the range of kilnchambers B, the drying-channel Khaving sheet-metal ceiling is forming a longitudinal channel 75 aboveit, communicating at one end with the drying-ohannelK; pipes R formingcommunication between the respective kiln-chambers B and channel and thedraftchimney T communicating with the channel K at the end remote fromthat at which gases are delivered from the channel 70; substantially asand for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of twowitnesses.

HENRI FRANS JOSEPH WEIJERS.

Witnesses:

E. H. L. MUMMENHOFF, AUGUST Li'IHRs.

